Endless Facts, One Snippet at a Time
Bell’s Theorem: Proving Quantum Entanglement Is Real
- Bell’s Theorem was introduced in 1964 by physicist John Bell.
- It provides a way to test whether quantum entanglement is real or just hidden variables.
- Bell derived mathematical inequalities that classical physics must obey.
- Quantum mechanics predicts violations of these inequalities through entanglement.
- Experiments repeatedly show Bell’s inequalities are broken—favoring quantum theory.
- This means entangled particles really do influence each other instantly.
- The results rule out “local hidden variables” as an explanation of quantum behavior.
- Bell’s Theorem turned entanglement from speculation into experimental science.
- Nobel Prizes in 2022 honored physicists who confirmed Bell’s predictions.
- It cements entanglement as a fundamental, nonlocal feature of reality.